Conceptis Japan Ltd. has become the major motivating spirit, spreading awareness of logic puzzles for the benefit of puzzle fans throughout the world since the company was founded in 1997.

BattleShips

A typical Battleship puzzle consists of a 10x10 grid containing a hidden fleet of ten known ships. The only information is numbers telling how many ship segments are in each row and column, and some given ship segments in various places in the grid. The object is to discover where all ten ships are located in the grid.

Each Battleship puzzle represents an ocean with a hidden fleet of ships, which may be oriented horizontally or vertically within the grid such that no ship touches another, not even diagonally. The numbers on the right and on the bottom of the grid show how many squares in the corresponding row and column are occupied by ship segments. Occasionally some squares may contain given ship or water segments to help start the puzzle. The object is to discover where all ships are located.

Each Battleship puzzle represents an ocean with a hidden fleet of ships, which may be oriented horizontally or vertically within the grid such that no ship touches another, not even diagonally. The numbers on the right and on the bottom of the grid show how many squares in the corresponding row and column are occupied by ship segments. Occasionally some squares may contain given ship or water segments to help start the puzzle. The object is to discover where all ships are located.

Sudoku

The Classic Sudoku is a number placing puzzle based on a 9x9 grid with several given numbers. The object is to place the numbers 1 to 9 in the empty squares so that each row, each column and each 3x3 box contains the same number only once.

Sudoku puzzles come in endless number combinations and range from very easy to extremely difficult taking anything from five minutes to several hours to solve. Sudoku puzzles also come in many variants, each variant looking differently and each variant offering a unique twist of brain challenging logic.

Each puzzle consists of a 9x9 grid containing given clues in various places. The object is to fill all empty squares so that the numbers 1 to 9 appear exactly once in each row, column and 3x3 box.

Sudoku puzzles come in endless number combinations and range from very easy to extremely difficult taking anything from five minutes to several hours to solve. Sudoku puzzles also come in many variants, each variant looking differently and each variant offering a unique twist of brain challenging logic.

Each puzzle consists of a 9x9 grid containing given clues in various places. The object is to fill all empty squares so that the numbers 1 to 9 appear exactly once in each row, column and 3x3 box.

SlitherLink

Slitherlink is a loop-forming puzzle. Unlike other logic puzzles, Slitherlink are solved by drawing lines around the clues according to the rules until a closed loop is formed.

Slitherlink puzzles come in many sizes and range from very easy to extremely difficult taking anything from five minutes to several hours to solve.

Each puzzle consists of a rectangular lattice of dots with some clues in various places. The object is to link adjacent dots so:

The value of each clue equals the number of links surrounding it.

Empty squares may be surrounded by any number of links.

When completed, the solution forms a single continuous loop with no crossings or branches.

Slitherlink puzzles come in many sizes and range from very easy to extremely difficult taking anything from five minutes to several hours to solve.

Each puzzle consists of a rectangular lattice of dots with some clues in various places. The object is to link adjacent dots so:

The value of each clue equals the number of links surrounding it.

Empty squares may be surrounded by any number of links.

When completed, the solution forms a single continuous loop with no crossings or branches.

Kakuro

Kakuro are easy to learn yet highly addictive language-independent logic puzzles now following the footsteps of the worldwide Sudoku success. Requiring just pure logic and simple add/subtract calculations, these numerical-crossword puzzles will carry you into a fascinating world of number combinations you never imagined could exist.

Best defined as number crosswords, Kakuro puzzles come in endless variations, are available in almost any grid size and range from very easy to extremely difficult taking anything from ten minutes to several hours to solve. Make one mistake and you’ll find yourself stuck later on as you get closer to the solution.

Each puzzle consists of a blank grid with sum-clues in various places. The object is to fill all empty squares using numbers 1 to 9 so the sum of each horizontal block equals the clue on its left, and the sum of each vertical block equals the clue on its top. In addition, no number may be used in the same block more than once.

Best defined as number crosswords, Kakuro puzzles come in endless variations, are available in almost any grid size and range from very easy to extremely difficult taking anything from ten minutes to several hours to solve. Make one mistake and you’ll find yourself stuck later on as you get closer to the solution.

Each puzzle consists of a blank grid with sum-clues in various places. The object is to fill all empty squares using numbers 1 to 9 so the sum of each horizontal block equals the clue on its left, and the sum of each vertical block equals the clue on its top. In addition, no number may be used in the same block more than once.

CalcuDoku

CalcuDoku are math based puzzles coupled with logic. Unlike other logic puzzles, CalcuDoku uses addition, subtraction, multiplication and division in ways which are deeper and more gratifying than anyone can imagine.

CalcuDoku puzzles come in many sizes and range from very easy to extremely difficult taking anything from five minutes to several hours to solve. However, make one mistake and you’ll find yourself stuck later on as you get closer to the solution.

CalcuDoku puzzles come in many sizes and range from very easy to extremely difficult taking anything from five minutes to several hours to solve. However, make one mistake and you’ll find yourself stuck later on as you get closer to the solution.

Hitori

Hitori is a number-elimination puzzle. Unlike Sudoku and Kakuro, Hitori puzzles start with all the numbers in the grid and your task is to eliminate some of them according to the rules.

Using pure logic and requiring no math to solve, these fascinating puzzles offer endless fun and intellectual entertainment to puzzle fans of all skills and ages.

Hitori puzzles come in many sizes and range from very easy to extremely difficult taking anything from five minutes to several hours to solve. However, make one mistake and you’ll find yourself stuck later on as you get closer to the solution.

Using pure logic and requiring no math to solve, these fascinating puzzles offer endless fun and intellectual entertainment to puzzle fans of all skills and ages.

Hitori puzzles come in many sizes and range from very easy to extremely difficult taking anything from five minutes to several hours to solve. However, make one mistake and you’ll find yourself stuck later on as you get closer to the solution.

Link-a-Pix

Link-a-Pix is a clue-linking puzzle based on a grid with a pixel-art picture hidden inside. Using logic alone, the solver determines which squares are painted and which should remain empty until the hidden picture is completely exposed.

Each puzzle consists of a grid containing clues in various places. Every clue, except for the 1’s, is half of a pair. The object is to reveal a hidden picture by linking the pairs and painting the paths so that the number of squares in the path, including the squares at the ends, equals the value of the clues being linked together. Squares containing 1 represent paths that are 1-square long. Paths may follow horizontal or vertical directions and are not allowed to cross other paths.

Each puzzle consists of a grid containing clues in various places. Every clue, except for the 1’s, is half of a pair. The object is to reveal a hidden picture by linking the pairs and painting the paths so that the number of squares in the path, including the squares at the ends, equals the value of the clues being linked together. Squares containing 1 represent paths that are 1-square long. Paths may follow horizontal or vertical directions and are not allowed to cross other paths.

Pic-a-Pix

Pic-a-Pix is a block-placing puzzle based on a grid with a pixel-art picture hidden inside. Using logic alone, the solver determines which squares are painted and which should remain empty until the hidden picture is completely exposed.

Each puzzle consists of a blank grid with clues on the left of every row and on the top of every column. The object is to reveal a hidden picture by painting blocks in each row and column so their length and sequence corresponds to the clues, and there is at least one empty square between adjacent blocks.

Each puzzle consists of a blank grid with clues on the left of every row and on the top of every column. The object is to reveal a hidden picture by painting blocks in each row and column so their length and sequence corresponds to the clues, and there is at least one empty square between adjacent blocks.

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